LED display panel and display device

Abstract

A LED display panel includes a substrate, a light source assembly disposed on the substrate, and a light filter layer disposed on the light source assembly. The light filter layer includes a light filter region. The light filter region includes a light-transmitting region and a non-light-transmitting region disposed outside the light-transmitting region. An incident angle of a light emitted by the light source assembly to the light-transmitting region is less than a total reflection critical angle of the light filter layer, and an incident angle of the light emitted by the light source assembly to the non-light-transmitting region is greater than or equal to the total reflection critical angle of the light filter layer. The total reflection critical angle is a critical angle at which the light exits from an upper surface of the light filter layer. A display device includes the LED display panel.

What is claimed is: 
     
         1 . A Light Emitting Diode (LED) display panel, comprising:
 a substrate;   a light source assembly disposed on the substrate; and   a light filter layer disposed on the light source assembly, being colorless and transparent, and comprising a light filter region, wherein the light filter region comprises a light-transmitting region and a non-light-transmitting region, the non-light-transmitting region is disposed outside the light-transmitting region, an incident angle of a light emitted by the light source assembly to the light-transmitting region is less than a total reflection critical angle of the light filter layer, an incident angle of the light emitted by the light source assembly to the non-light-transmitting region is greater than or equal to the total reflection critical angle of the light filter layer, and the total reflection critical angle is a critical angle at which the light exits from an upper surface of the light filter layer.   
     
     
         2 . The LED display panel according to  claim 1 , wherein the non-light-transmitting region is disposed around the light-transmitting region. 
     
     
         3 . The LED display panel according to  claim 1 , wherein a part of the upper surface corresponding to the light filter region is shaped as a curved surface or a flat surface. 
     
     
         4 . The LED display panel according to  claim 3 , wherein a refractive index of the light filter layer is greater than a refractive index of a medium outside the upper surface of the light filter layer. 
     
     
         5 . The LED display panel according to  claim 4 , wherein a centerline of the light-transmitting region coincides with a centerline of the light source assembly. 
     
     
         6 . The LED display panel according to  claim 1 , wherein the light source assembly comprises two or more light-emitting sources, the light filter layer comprises two or more light filter regions disposed corresponding to the light-emitting sources, and the LED display panel further comprises one or more baffles disposed between the light-emitting sources. 
     
     
         7 . The LED display panel according to  claim 6 , wherein the baffles are disposed between the substrate and the light filter layer, one end of each of the baffles is in contact with the substrate, and another end of each of the baffles is in contact with the light filter layer. 
     
     
         8 . A Light Emitting Diode (LED) display panel, comprising:
 a substrate;   a light source assembly disposed on the substrate; and   a light filter layer disposed on the light source assembly and comprising a light filter region, wherein the light filter region comprises a light-transmitting region and a non-light-transmitting region, the non-light-transmitting region is disposed outside the light-transmitting region, the non-light-transmitting region is provided with a non-light-transmitting coating, an incident angle of a light emitted by the light source assembly to the light-transmitting region is less than a total reflection critical angle of the light filter layer, an incident angle of the light emitted by the light source assembly to the non-light-transmitting region is greater than or equal to the total reflection critical angle of the light filter layer, and the total reflection critical angle is a critical angle at which the light exits from an upper surface of the light filter layer.   
     
     
         9 . The LED display panel according to  claim 8 , wherein the non-light-transmitting region is disposed around the light-transmitting region. 
     
     
         10 . The LED display panel according to  claim 8 , wherein a part of the upper surface corresponding to the light filter region is shaped as a curved surface or a flat surface. 
     
     
         11 . The LED display panel according to  claim 10 , wherein a refractive index of the light filter layer is greater than a refractive index of a medium outside the upper surface of the light filter layer. 
     
     
         12 . The LED display panel according to  claim 11 , wherein a centerline of the light-transmitting region coincides with a centerline of the light source assembly. 
     
     
         13 . The LED display panel according to  claim 8 , wherein the light source assembly comprises two or more light-emitting sources, the light filter layer comprises two or more light filter regions disposed corresponding to the light-emitting sources, and the LED display panel further comprises one or more baffles disposed between the light-emitting sources. 
     
     
         14 . The LED display panel according to  claim 13 , wherein the baffles are disposed between the substrate and the light filter layer, one end of each of the baffles is in contact with the substrate, and another end of each of the baffles is in contact with the light filter layer. 
     
     
         15 . A display device, comprising a Light Emitting Diode (LED) display panel, the LED display panel comprising:
 a substrate;   a light source assembly disposed on the substrate; and   a light filter layer disposed on the light source assembly and comprising a light filter region, wherein the light filter region comprises a light-transmitting region and a non-light-transmitting region, the non-light-transmitting region is disposed outside the light-transmitting region, an incident angle of a light emitted by the light source assembly to the light-transmitting region is less than a total reflection critical angle of the light filter layer, an incident angle of the light emitted by the light source assembly to the non-light-transmitting region is greater than or equal to the total reflection critical angle of the light filter layer, and the total reflection critical angle is a critical angle at which the light exits from an upper surface of the light filter layer; and   two or more Liquid Crystal Display (LCD) panels, wherein the LED display panel is disposed between adjacent LCD panels, and a light-emitting angle of the light emitted by the light source assembly passing through the light-transmitting region is similar to or same as a viewing angle of the LCD panels.   
     
     
         16 . The display device according to  claim 15 , wherein the non-light-transmitting region is disposed around the light-transmitting region. 
     
     
         17 . The display device according to  claim 15 , wherein a part of the upper surface corresponding to the light filter region is shaped as a curved surface or a flat surface. 
     
     
         18 . The display device according to  claim 17 , wherein a refractive index of the light filter layer is greater than a refractive index of a medium outside the upper surface of the light filter layer. 
     
     
         19 . The display device according to  claim 18 , wherein a centerline of the light-transmitting region coincides with a centerline of the light source assembly. 
     
     
         20 . The display device according to  claim 15 , wherein the light filter layer is colorless and transparent.